We will demolish the existing road bridge which was built in 1922. The bridge has reached the end of its operational life and is beyond simple repair. Not replacing the bridge would mean permanent closures of footway and cycle tracks, lane closures and restrictions on the type or weight of vehicles that use the bridge.
More inspections and maintenance would be needed, causing considerable disruption to traffic and rail operations in the long term.
We are investing around £35m to rebuild the Power Road Bridge. The works are part of our programme to improve London's roads and public spaces.
The project is divided into five phases:
Our partner Hochtief (UK) is currently working on the underside of the bridge building the new abutments for the replacement bridge. This is in preparation for demolition of the western side of the bridge in late spring 2017.
Another partner, Skanska (UK) is currently working on the western side of the bridge to divert gas, electricity, water and telecommunications services from the existing carriageway on and over the new service bridge. This work should be completed by late January 2017.
Works to divert utilities from the existing carriageway to the new service bridge are nearly finished.
A single lane closure will be in place on the A406 North Circular Road (Gunnersbury Avenue) northbound until early January while we carry out this phase of work. More lane closures will be needed in 2017 for the rest of the demolition and construction works.
The new structure replacing the existing bridge has been designed to last at least 120 years.
Utilities (gas, electricity, water and telecommunications) in the existing carriageway are being relocated to a new service bridge which will stay in place after the work is finished. This will reduce the need to close traffic lanes on the road bridge during future maintenance of these utility pipes and cables.
The new bridge will have improved footways, lighting and better facilities for cyclists on the western side, making this section of the A406 safer for all users.
Vehicle access to the A406 Gunnersbury Avenue bridge will still be possible from both directions during the works. A temporary 30mph speed restriction is in place between the Chiswick Roundabout and Park Place Drive.
The A406 Gunnersbury Avenue will be reduced to three running lanes (one northbound and two southbound) during the demolition and construction phases (April 2017 to December 2017).
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At all times during the works we will ensure there is a safe route for pedestrians to cross over the railway.
The footway on the western side of the bridge has been closed since the works started. Pedestrians and cyclists should follow the signed diversion route on the eastern side of the bridge via the footbridge next to Princess Avenue.
The eastern footway between Princes Avenue and Power Road has been temporally converted into a shared footway for pedestrians and cyclists. Cyclists are reminded to be considerate to pedestrians when using the shared area.
The diversion will stay in place until a safe route can be opened on the western side of the bridge. We are currently finishing designs for converting the service bridge into a temporary footbridge to provide a safe route for both pedestrians and cyclists. We hope to open this in March 2017.
Preparation works are now underway for replacement of the main bridge. We are working increased hours, from 07:00 to 19:00 on weekdays and Saturdays. Some working may also be needed on Sundays and bank holidays.
To reduce noise, vibration and disruption during the works we are using a range of measures including:
We will also have recycling skips on site to ensure we recycle everything we can.
Local residents and businesses will be updated about the works by mail. You can also email PLO.PowerRoad@hochtief.co.uk
We are delivering this project in partnership with Hochtief (UK) Construction, Ramboll and Parsons Brinckerhoff, and Skanska UK.
We are working closely with Network Rail, the London Boroughs of Hounslow and Ealing and the emergency services to minimise disruption and ensure the works proceed as safely, efficiently and as quickly as possible.